TAIZAC -TAndem Injectors Zapping ACtivation- towards Thermal Efficiency Improvement of Diesel Engine

Abstract

Targeting thermal efficiency improvement of diesel engines with injection rate shaping, TAIZAC (TAndem Injectors Zapping ACtivation) injector consisting of commercially available two common-rail injectors was developed as a research tool. Control of injection timing and duration of the upper injector realized (1) originally targeted inversed-delta injection rate shaping, (2) sharper rise of initial injection rate, and (3) modulation of injection pressure among and during multi-injection pulses, ex. low pressure pre-injection and high pressure main injection.